J
Jeff
Perhaps someone could explain something I don't understand about the hype
about 1.5 vs. 3 Sata. Forgive me if I'm not using the precise terminology -
corrections are welcome.
The figures obviously refer to the speed of the interface and not the
transfer rates of the drives themselves. The drive transfer rates are far
slower. It would take multiple drives to fill the bandwidth of even the 1.5
SATA bus, however. In a SCSI system, placing an older drive on a newer bus
will drop the bus speed, which could slow down the bus so that it
potentially could be slower than a few of the newer, faster drives working
together. ...but I am told that since SATA is serial, that placing a 1.5
Sata on the same bus as a 3.0 will not slow it down since each scsi port is
essentially isolated and not affected by the others. Further, the 1.5 is
still much faster than several drives even though typically only a single
drive is used per sata channel/port. I'm aware that it is possible to use (I
think it is called) a port multiplier to place several sata drives on the
same port, so that's the only situation that I can fathom where the bus
speed might matter.
In sum, what benefits actually occur with having a SATA 2 instead of a SATA
1? I don't understand how there could be any unless one were running
multiple drives off of a single port with a port multiplier. ...but I keep
hearing people say otherwise. What am I not understanding?
Jeff
about 1.5 vs. 3 Sata. Forgive me if I'm not using the precise terminology -
corrections are welcome.
The figures obviously refer to the speed of the interface and not the
transfer rates of the drives themselves. The drive transfer rates are far
slower. It would take multiple drives to fill the bandwidth of even the 1.5
SATA bus, however. In a SCSI system, placing an older drive on a newer bus
will drop the bus speed, which could slow down the bus so that it
potentially could be slower than a few of the newer, faster drives working
together. ...but I am told that since SATA is serial, that placing a 1.5
Sata on the same bus as a 3.0 will not slow it down since each scsi port is
essentially isolated and not affected by the others. Further, the 1.5 is
still much faster than several drives even though typically only a single
drive is used per sata channel/port. I'm aware that it is possible to use (I
think it is called) a port multiplier to place several sata drives on the
same port, so that's the only situation that I can fathom where the bus
speed might matter.
In sum, what benefits actually occur with having a SATA 2 instead of a SATA
1? I don't understand how there could be any unless one were running
multiple drives off of a single port with a port multiplier. ...but I keep
hearing people say otherwise. What am I not understanding?
Jeff